Apparatus for cutting cams.



S. A. BHISEY. APPARATUS FOR CUTTING CAMS.

APPLICATION FILED FEB. 17. 1915.

V Patented Sept. 12,1916.

2 SHEETS-SHEET l.

S. A; BHISEYL APPARATUS FOR CUTTING CAM S. APPLICATION FILED FEB. 17,1915.

' B Patented Sept. 12, 1916.

2 SHEETS-SHEET 2.

I v w %0 menses.

{ ing a sliding member adapted a with and 10 of ordinary form areprovided the APPATUS FOR' GUTTHIG CS.

I Specification 'of' Letters Patent.

ratentea Sept. is, rare.

Application filed February 1-7, 1915. Serial-No. 8,961.

To all whom it-may concern:

Be it known that I, SHANKER ABAJI BHIsEY, a subject of the King of GreatBritain, residing at London, England, have invented certain new anduseful Improvements in Apparatus for Cutting Cams, of which thefollowing is. aspecification, reference being had drawing.

This invention relates to. improvements in apparatus for cutting cams,and has for its object to provide an attachment for lathes or the likeby means of which either edge or face cams can be conveniently andexpeditiously out.

The invention consists broadly in providto carry the blank in which thecam is to be viding blank and a former and providing means whereby theformer operates in its rotation to cause a change in the position of theblank relative to a rotary cutter or milling tool in conformity with itscurvature so that the curvature of the former will be accuratelyreproduced in the cam or cam path being out.

in the illustrated a machine embodying the essential features of myinvention, Figure 1 being an elevational view of the machine.

Fig 2 is a plan view thereof. Fig. 3 is a B-B of Fig. 4.

Referring to these drawings and particularly to Figs. 1, 2. and 3 thenumeral 1 designates a worm which gears with a worm wheel 2 keyed orotherwise secured upon a shaft 3. Upon this shaft 3 the former 4 is alsorigidly secured. The shaft 3 also has secured to it a bevel wheel 5which gears a bevel wheel 6. Lathe centers '2, 8, 9

carry the work centers 7 and 8 serving to being out while when certainface cams are the centers 9 and 10 serve to The-whole of the mechanism'hcrcinhetore I table 14 sliding.

therein to the accompanying a standard or able known manner. 7 out andpro-' meansfor synchronously rotating thefor instance, of the hanaccompanying drawings I have the former purvature results.

centers 9 and 10 as indicated adopt the arrangement.

described is carried upon a table ltwhich 1s slidably mounted in thedovetail guide 16. The shding tab e 14: has attached to it at 17 one endof a flexible cord or chain 18 which passes over a fixed pulley l9 andhas attached to its other end a weight 20. Upon pedestal 21 rising fromthe fixed base 15 a roller 22 is mounted andthis roller 22 cooperateswith the edge of the I former 4c the weight 20 operating to insurecontact between the roller former 4 under all conditions. The camcutting tool 23 usually an ordinary milling cutter forms no part of the.prese'nt invention and may be carried and driven in any suit- 22 andthe he operation of the machine is as follows:-The cutter 23 is startedand entered the required depth into the blank. The worm 1 is thengradually rotated by means, dle 2a and .by this means the worm wheel 2;mer 4 keyed thereon are all I rotated. By reason of the coiiperation oithe former 4 With the roller '22 the sliding table 14: is caused by theweight 20 to move backward and forward according to the curvature of andthus the cam blank or work 11 is caused to move in relation to therotary tool or cutter 23' and thus the curvature of the -former isaccurately re roduced and a cam or cam path of the desired he drawingsillustrate the cutting of a cam path in' the periphery of the work butif it is desired to out the periphery itself to a given curvature or cuta cam path in a face of the work the work is arranged beinstead of thetween the centers 7 and 8 by dotted lines in Fig. 2 where the cutter-23isseen cutting a cam in the face of the work 11.

The machine hereinbefore described will insure cams having the curvatureof the former but in order to enable cams of any size to be cut from.the same former with upon a fixed base l5-the shaft 3 and forthecurvature increased or reduced in exact to its size l propose to shownin Figs. 4% by, the movements imparted to the sliding table 29 carryingthe work: the worna an worm wheel 31 and 32 respectively andthetor-liner will be indirect proportion according and 5 where haveprovided a means proportion to the size of cam being out. 'In order toinsure this I provide a roller 3 k carried by amember 35 slidablymounted in ides .36 in a supporting standard or frame 37 The slidingmember 35 is connected to the sliding work carrying table 29'by meansuation markings as indicated at 42 may be provided to facilitate theadjustment.

It will be seen that by my invention I whereby cams can be out either inthe edge, upon the edge, or in the face of the blank from the samesample former and moreover it is never necessary to alter the positionof the former or move the table. a

What I claim and desire to secure by Letters Patent is:

Cam cutting apparatus comprising a cutter of fixed location, a workcarrying table slidable relative to the cutter, a former, means forrotating said former, means for carrying the work between centers withthe axis thereof in a plane at right angles to that of the former, meansfor causing the work to rotate in a plane at right angles to the former,and means whereby the former in its rotation operates to control thelateral movement of the work relative to the stationary cutter wherebycam grooves can be cut in the periphery of the work.

- In testimony whereof I afiix my signature in presence of twowitnesses.

SHANKER ABAJI BI-IISEY.

Witnesses:

H. D. JAMEsoN, A. NUTTING.

